The Journal of surgical research
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Natural killer (NK) cells, as the main effector subpopulation of the innate immune system, play an important role in the control of the rise and spread of malignant tumors. Regional lymph nodes (LN) represent the first immunologic barrier to tumor metastasis. Since there are scarce data on NK cells from regional LN of cancer patients, the aim of this study was to investigate the expression of several activating and inhibitory receptors on the entire NK cell population as well as their CD3(-)CD56(dim) and CD3(-)CD56(bright) functional NK subsets from regional LN of melanoma patients. ⋯ Our results indicate that with tumor infiltration into regional LN of melanoma patients, NK cells, mostly of the CD56(dim) subset, are recruited into draining LN. The invading NK cells show counterbalance of the increased expression of CD16 activating receptor and increased CD158b inhibitory killer Ig-like cell receptor.
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The purpose of this study was to elucidate the possible beneficial effects of adiponectin (APN) on acute lung injury in a rat model of sepsis. ⋯ Adiponectin administration ameliorates acute lung injury in a rat model of sepsis induced by CLP, no matter whether it is administrated before or after the onset of sepsis.
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Comparative Study
Propofol attenuates renal ischemia-reperfusion injury aggravated by hyperglycemia.
Hyperglycemia exacerbates renal ischemia-reperfusion (IR) injury via aggravated inflammatory response and excessive production of reactive oxygen species. This study aimed to investigate the ability of propofol, a known antioxidant, to protect kidneys against IR injury in hyperglycemic rats in comparison with normoglycemic rats. ⋯ Propofol conveyed renoprotection against IR injury by preserved antioxidation ability and attenuated inflammatory response, which were more prominent under hyperglycemia.
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Hemorrhagic shock activates cellular stress signals and can lead to systemic inflammatory response, organ injury, and death. Mitogen-activated protein kinase (MAPK) acts as a sensor of tissue injury in models of ischemia-reperfusion injury. Lipoxins are endogenous lipid mediators with potent anti-inflammatory and pro-resolving actions. We hypothesized that BML-111 (a lipoxin A4-receptor agonist) attenuates hemorrhagic shock-induced acute lung injury (ALI) through inhibiting activation of the MAPK pathway. ⋯ This study indicates that BML-111 attenuated hemorrhagic shock-induced ALI via the MAPK/activator protein-1 signaling pathway. Therefore, BML-111 may have therapeutic potential for hemorrhagic shock-induced ALI.
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Cutaneous thermal injuries (i.e., burns) remain a common form of debilitating trauma, and outcomes are often worsened by wound infection with environmental bacteria, chiefly Pseudomonas aeruginosa. ⋯ These data suggest that early administration of azithromycin following burn-related trauma and infection may reduce P aeruginosa infection and potential interactions with other antibiotics should be considered when designing future studies.